<?php
/**
 * 有道智云翻译模型
 */
class Youdao_model extends CI_Model {
    private $url    = 'http://openapi.youdao.com/api';
    private $appkey = '48221c974efdb477';
    private $seckey = 'h3lv9ejJe5Yi4Sn6C7q6tgEKI1wAzwUH';

//翻译入口
    public function translate($query, $from = 'EN', $to = 'zh-CHS') {
        $args = array(
            'q'      => $query,
            'appKey' => $this->appkey,
            'salt'   => rand(10000, 99999),
            'from'   => $from,
            'to'     => $to,

        );
        $args['sign'] = $this->buildSign($this->appkey, $query, $args['salt'], $this->seckey);
        $ret          = $this->call($this->url, $args);
        // echo $ret;
        $ret = json_decode($ret, true);
        return $ret;
    }

//加密
    public function buildSign($appKey, $query, $salt, $secKey) {
        $str = $appKey . $query . $salt . $secKey;
        $ret = md5($str);
        return $ret;
    }

//发起网络请求
    public function call($url, $args = null, $method = "post", $testflag = 0, $timeout = 20, $headers = array()) {
        $ret = false;
        $i   = 0;
        while ($ret === false) {
            if ($i > 1) {
                break;
            }

            if ($i > 0) {
                sleep(1);
            }
            $ret = $this->callOnce($url, $args, $method, false, $timeout, $headers);
            $i++;
        }
        return $ret;
    }

    public function callOnce($url, $args = null, $method = "post", $withCookie = false, $timeout = 20, $headers = array()) {
        $ch = curl_init();
        if ($method == "post") {
            $data = $this->convert($args);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            curl_setopt($ch, CURLOPT_POST, 1);
        } else {
            $data = convert($args);
            if ($data) {
                if (stripos($url, "?") > 0) {
                    $url .= "&$data";
                } else {
                    $url .= "?$data";
                }
            }
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        if (!empty($headers)) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        }
        if ($withCookie) {
            curl_setopt($ch, CURLOPT_COOKIEJAR, $_COOKIE);
        }
        $r = curl_exec($ch);
        curl_close($ch);
        return $r;
    }

    public function convert(&$args) {
        $data = '';
        if (is_array($args)) {
            foreach ($args as $key => $val) {
                if (is_array($val)) {
                    foreach ($val as $k => $v) {
                        $data .= $key . '[' . $k . ']=' . rawurlencode($v) . '&';
                    }
                } else {
                    $data .= "$key=" . rawurlencode($val) . "&";
                }
            }
            return trim($data, "&");
        }
        return $args;
    }

    /**
     * 将有道智云返回的数组中必要的信息整理成字符串
     * @param  array $result 有道智云api返回的数组
     * @return string        根据输入内容的类型，返回单词的解释或者长句的翻译
     */
    public function ydTransToStr($result) {

        // http://ai.youdao.com/docs/doc-trans-api.s#p03
        if (isset($result['basic']['explains'])) {
            $str = '';
            foreach ($result['basic']['explains'] as $key => $value) {
                $str .= "<p>" . $value . "</p>";
            }
            return $str;
        } elseif (isset($result['translation'])) {
            return $result['translation'][0];
        } else {
            return '没查到';
        }

    }
}


?>